var currentPopupWindow=false;
function openPopupWindow(link)
{
        if(!currentPopupWindow || currentPopupWindow.closed)
        {
         currentPopupWindow=window.open(link,"Card","toolbar=no,scrollbars=yes,dependent=yes,resizable=yes,left=200,top=80,width=600,height=500");
        }
         else
        {
        currentPopupWindow.location.href=link;
        currentPopupWindow.focus();
}
}